Falling Bell Trap (CR 5)

Effect Falling bronze bell, targets 1d4 characters (in area E1 or E2 if playing AP#2), Atk +15 (6d6 bludgeoning damage). In AP#2 the bell falls and breaks stairs in a 10-foot long swath wherever it hits a PC. A character damaged by the bell falls through broken stairs into area E1, taking falling damage unless he makes a DC 15 Reflex save to cling to the broken stairs.